fix: downgrade undici to v6.x to fix File is not defined on Node.js 18

Co-authored-by: brendandburns <5751682+brendandburns@users.noreply.github.com>

Author: Copilot

package-lock.json

@@ -70,7 +70,7 @@
         "socks-proxy-agent": "^8.0.4",
         "stream-buffers": "^3.0.2",
         "tar-fs": "^3.0.9",
-        "undici": "^7.24.0",
+        "undici": "^6.24.1",
         "ws": "^8.18.2"
     },
     "devDependencies": {